In firefox there is an option to change many settings of it, this can be done using typing
about:config
in address bar of Mozilla firefox. On this settings page now do following.
keyword.enabled set to true, if not already
keyword.url = http://dak9.com/ , instead of http://dak9.com/ you can type any url.
Now If I type xyz and press enter, then firefox will lead me to http://dak9.com/xyz.
And since I am using my domain http://dak9.com as url shortner using a MySql-PHP script, I just type a word in the firefox loacation bar and I am redirected to my target page.